Anthraquinoid dyestuffs

ABSTRACT

AN ANTHRAQUINOID DYESTUFF WHICH COMPRISES AT LEAST ONE RESIDUE OF AN ANTHRAQUINOID DISPERSE DYESTUFF AND AT LEAST ONE RESIDUE OF A DISPERSE DYESTUFF OF THE STYRL SERIES.

United States Patent Cffice 3,663,577 Patented May 16, 1972 US. Cl. 260-377 3 Claims ABSTRACT OF THE DISCLOSURE An anthraquinoid dyestuif which comprises at least one residue of an anthraquinoid disperse dyestufi and at least one residue of a disperse dyestuif of the styryl series.

The present invention provides dyestuffs, which are preferably free from sulphonic acid groups and in which the residue of an anthraquinoid dyestufl is linked with a residue of a styryl dyestuff.

The residue of the styryl dyestufi may be either a negative group linked with the double bond of the styryl grouping, for example, a sulphonamide group or a car-boxy] ester group, linked with the residue of the anthraquinoid dyestuff; or, preferably, it is linked through an alkyl group, which is attached to the nitrogen atom in the para-position of the styryl residue and which may contain any desired substituents. Accordingly, preferred anthraquinone dyestuffs are those which contain a styryl residue of the formula NC R1 in which R represents an unsubstituted or substituted alkyl, group R represents an unsubstituted or substituted alkylene residue, A represents an unsubstituted or substituted para-phenylene residue and X represents a negative substituent, for example, a cyano, carbalkoxy, carbonamido or arylsulphonyl group.

Another preferred type of the new dyestuffs are anthraquinone dyestuffs that contain a residue of the formula in which A and R have the meanings given above, R has the same meaning as R and the residues R and R may be identical or different from each other, and X represents a residue bound to the residue of the styryl dyestuif through a SO or -CO- bridge, being for example a -SO arylene, --SO N (alkyl) alkylene, -CO-N-(a1kyl)-alkylene or --CO-O-alkylene residue, in which alkyl and alkylene represent unsubstituted or substituted alkyl, aralkyl or cycloalkyl groups having one or two free valences respectively.

The anthraquinoids residues may be anthraquinone residues bound to the styryl dyestuffs (1) in the oc-POSitiOIl or (2) in the 5-position.

Anthraquinones substituted in a-position contain, for example, a substituted amino group or aminophenylamino group which carries the residue of a styryl dyestuif.

Anthraquinones substituted in fl-position contain in the linking position, for example, a sulphonyloxy or carbonyloxy residue derived from the corresponding anthraquinonesulphonic or -carboxylic acid.

Valuable dyestuffs are those of the formula d L V-Rz' I C N r I X in which V represents an oxygen atom or imino group, R represents an unsubstituted or substituted alkyl group or a residue of the formula 0 Z1 Z4 0 Z1 M l 1 II I l Z2 Z3 0 in which Z is an amino group which may be alkylated, or a hydroxyl group, Z represents an amino group which may be alkylated or a nitro group or a bromine atom, and Z and Z each represents a nitro or hydroxyl group or an amino group which may be alkylated.

Of special value are, for example, the dyestuffs of the formulae l I X Z: 0

The groups R and R each represent alkyl groups containing 1 to 4, preferably 2 to 4, carbon atoms, for example, methyl, ethyl, propyl or n-butyl groups which may be substituted in the usual manner, for example, arylalkyl residues, for example, benzyl or B-phenethyl residues, halogenated alkyl groups, for example, fl-chloroethyl, 5,5,fi-trifluoroethyl, fl,- -dichloropropyl, B-cyanoethyl, fl-cyanoethoxyethyl, alkoxyalkyl, for example, fi-methoxyethyl, ,B-ethoxyethyl or E-methoxy-butyl, glycidyl, hydroxyalkyl, for example, {3hydroxyethyl, fl,'y-dihydroxypropyl, nitroalkyl, for example, fl-nitroethyl, carbalkoxy, for example fl-carbo (methoxy, ethoxy or propoxy)-ethyl [in which the terminal alkyl group may carry in the w-position cyano, carbalkoxy and acyloxy groups], B- or 'y-carbo(methoxy or ethoxy)propy1, acylaminoalkyl, for example, B-(acetyl or formyl)-aminoethyl, acyloxyalkyl, for example, ,B-acetyloxyethyl, fi-propionyloxyethyl, fi-butyryloxyalkyl, fl,'y-diacetoxypropyl, 'y-acetylaminopropyl, 'y-propionylaminopropyl, fl-(alkyl or aryl)-sulphonylalkyl, for example, B-methanesulphonylethyl, fl-ethanesulphonylethyl, B-(para-chlorobenzenesulphonyl)-ethyl, alkylor arylcarbamoyloxyalkyl, for example, p-methyl-carbamyloxyethyl and ,B-phenylcarbamyloxyethyl, alkyloxycarbonyl-oxyalkyl, for example, B-(methoxy, ethoxy or isopropoxy) carbonyloxyethyl, 'y aceta'midopropyl, B- (para-nitrophenoxy -ethyl, 13- (para-hydroxyphenoxy) -ethyl, 3-(/3-acetylethoxycarbonyl) ethyl, fl-[(,B'-cyano-, hydroxy-, methoxyor acetoxy)-ethoxycarbonyl]-ethyl, cyanoalkoxyalkyl, p-carboxyethyl, fi-acetylethyl, 'y-aminopropyl, fl-diethylaminoethyl, fi-cyanoacetoxyethyl and B-benzoylor fl-(para-alkoxy or phenoxy-benzoyl)-ethoxy groups.

Generally, the group R contains no more than 18 carbon atoms.

The group R is an alkyl group containing 1 to 4 carbon atoms, which may contain one or more substituents, for example, hydroxyl or acyloxy groups.

The present invention also provides a process for preparing the above-mentioned dyestuffs, wherein a reactive anthraquinone derivative is condensed with a reactive styryl dyestufi and, if desired, acylated with a fibre-reactive acylating agent.

Preferred reactants are those of which one contains a labile negative group and the other a substitutable nucleo-philic group, for example, a hydroxyl, mercapto or amino group. It is also possible to carry out other reactions on active double bonds.

4 (A) STARTING COMPOUNDS OF THE STYRYL SERIES (I) Reactive styryl dyestuffs that contain a labile negative residue, for example the styryl dyestuffs of the formulae N C (1411a NC CHzCIIzCI CH2CH2CI and CzHn (described in Swiss patent application No. 6,350/68 Case 6448).

(II) Reactive styryl dyestuffs that contain a nucleophilic substitutable residue, for example, the dystulfs of the formulae The styryl dyestuffs can be prepared in the usual manner by way of the Vilsmeyer reaction from a dialkylaniline and condensation of the intermediately formed 'y-formylaniline with a methylene-active compound.

Methylene-active compounds of the formula NC-CH -X suitable for the reaction are, for example:

(B) STARTING COMPOUNDS OF THE ANTHRA- QUIINONE SERIES (1) Starting compounds that contain a negative group which is labile (i.e. can be eliminated).

(1) Anthraquinone compounds that contain a negative mobile substituent in the oc-pOSifiOll, for example:

l-halogenanthraquinones, preferably l-bromoor 1- chloro-anthraquinones, for example, 1-bromo-4-methoxyanthraquinone, 1-bromo-3-phenyloxy-4-aminoanthraquinone, l-amino-4-bromo-anthraquinone-2-carboxylic acid- N,N-dimethylamide, 1-amino-4-chloro-2-methoxycarbonyl-anthraquinone, 1-amino-4-bromo-2-methoxycarbonyl-anthraquinone,

as well as anthraquinones that contain active halogen atoms, for example:

1-hydroxy-4-( 3-chloro carbonylphenyl) -aminoanthraquinone and l-amino-2-bromo-4-( 3 '-nitro-4-chlorophenylsulphonyl) -arnino-anthraquinone.

Another group of starting materials comprises the lnitro-anthraquinones which can be reacted with a styryl dyestutf containing a primary amino group by a method known per se, with replacement of the nitro group by the amino group, for example, 1,5-dihydroxy-4,S-dinitroanthraquinone. Moreover, there should be mentioned in this connection those a-hydroxyanthraquinones which in the presence of a reducing agent exchange hydroxyl groups for amino residues, especially l,4-dihydroxyanthraquinone whose hydroxyl groups can be considered to be negative residues for the present purpose.

Furthermore, there should be mentioned anthraquinone derivatives that contain in Ot-POSitlOIl one or several fibrereactive groups, for example:

1- [4'- 4"-chloro-6"-methoxyl",3",5"-triazinyl- 2"-amino anilino] -anthraquinone,

1,4-bis- ('y-chloro18-hydroxy-propy1amino -anthraquinone,

l-fi-hydroxyethylaminot- -chloro-p-hydroxypropylamino -anthraquinone,

l-methylamino-4- ('y-chloro-fl-hydroxy-propyl) -aminoanthraquinone,

1- ('y-chloro-fl-hydroxypropyl -amin0-4- (4'methylcyclo- 'hexylamino -anthraquinone,

1-methylamino-4- [2'-chloro-4'-bis- (hydroxyethyl) -amino- 1',3 ,5'-triazinylamino] -anthraquinone,

1-methylamino-4- (2'-bromoethyl amino) -anthraquinone,

1,4-bis- -bromopropylamino) -anthraquinone,

l-amino-4-( 3-chloro acetyl-anilino) -anthraquinone,

and the dyestufis of the formulae ?H (H) NH-CHHCH2OH NH-QOHzCH -NHC o-o=o on and (2) Anthraquinoid starting dyestutfs containing labile negative groups, linked in the fi-position, are the following compounds:

1-amino-4-nitroanthraquinone-Z-carboxylic acid chloride, 1-amino-4- 4-carbonamidophenyl) -amino anth raquinone- 2-carboxylic acid chloride, 1,4-dihydroxy-2-chloromethylphenylmercapto-anthraquinone,

as well as the compounds of the formulae I mO-Q-smNH-OZHM g l HceHs and (II) Anthraquinone dyestufls containing nucleophilic substitutable groups are, for example:

\ 1-(fi-aminoethylamino)-4-acetylamino-anthraquinone,

l-(B-aminoethylamino)-anthraquinone, l-acetylamino-4-hydroxy-anthraquinone, 1-amino-4-hydroxy-anthraquinone,

4 1-amino-4-chloro-anthraquinone,

1-amino-4-quanidino-anthraquinone, l-amino-4- p-hydroxyethylamino) -anthraquinone, 1-amino-2,4-dibromo-anthraquinone,

l- Z-hydroxyethylamino -anthraquinone, l-amino-2-isopropylmercapto-anthraquinone, 1-amino-2-methoxy-4-hydroxy-anthraquinone, 1,2-diamino-anthraquinone, l-hydroxy-anthraquinone, Z-hydroxy-anthraquinone, 1,2-dihydroxy-anthraquinone, l,4-dihydroxy-anthraquinone, 1,8-dihydroxy-anthraquinone, 1,2,4-trihydroxy-anthraquinone, 2,6-dihydroxy-anthraquinone,

1-arnino-2-chloroearbonyl- By the two last-mentioned reactions there are formed dyestuffs of the general formula in which Z Z Y, R c and X have the meanings defined above.

1-amino-2-ch1orocarbonyl-4-nitroarghragglinone+ HO'C2H4 ti'l) NH:

4 0 CO-O-CaHt-CzHrO-CO l reduction (I) NH:

CO-O-CzHt-O-C O i=CH-O-NR1R2 N A JHa NHa in which R and R, have the same meanings as above.

In general, the reaction is carried out in an organic solvent, for example, tetrahydrofuran, dimethylglycol ether, dioxan, chlorobenzene, nitrobenzene, dimethylformamide or sulpholan, or in an acid-binding organic medium, for example, pyridine.

ACYLATION WITH FIBRE-REACTIVE ACYLATING AGENTS 1 or 2 chlorine atoms or 1 or 2 arylsulphonyl or alkanesulphonyl groups on the pyrimidine ring, monoor bis-(7- halogeno-B-hpdroxypropyl)-amino groups, [3 halogenethylsulphamyl residues, B-halogenethoxy groups, fl-halogenethylmercapto groups, v-halogeno-fl-hydroxypropylsulphamyl residues, chloroacetylamino groups, vinylsulphonyl groups, 2,3-epoxypropyl groups or other fibre-reactive residues, preferably such as are free from groups imparting solubility in water.

(III) Use.-The dyestuffs described above contain no acid groups imparting solubility in water, especially no sulphonic acid groups, so that they are sparingly soluble to insoluble in water.

The water-insoluble dyestufls, mixtures of such waterinsoluble dyestuffs and their mixtures with other dyestuifs are extremely suitableespecially after having been finely dispersed, for example by grinding, pasting or precipitation-for dyeing or printing synthetic fibres such, for example, as acrylic or acrylonitrile fibres, polyacrylonitrile fibres and copolymers of acrylonitrile and other vinyl compounds, for example, acrylic esters, acrylamides, vinylpyridine, vinylchloride, or vinylidenechloride, copolymers of dicyanoethylene and vinylacetate, also acrylonitrile block copolymers, fibres of polyurethanes, polyolefins, cellulose triand 2 /z-acetate, polyamides, for example, nylon 6, nylon 6,6 or nylon 12, and more especially fibres of aromatic polyesters such as terephthalic acid and ethyleneglycol or 1,4-dimethylolcyclohexane, and copolymers of terephthalic or isophthalic acid and ethyleneglycol.

Accordingly, the present invention also provides a process for dyeing or printing synthetic fibres, especially polyester fibres, wherein a dyestufi of anthraquinoid nature, which is free from sulphonic acid groups and contains at least one residue of a styryl dyestufi, a mixture of such a dyestufi, or a mixture of such a dyestufl with another dyestuif, is used.

For dyeing, the water-insoluble dyestuifs are advantageously used in a finely dispersed form and dyeing is carried out in the presence of a dispersant, for example, sulphite cellulose waste liquor or of a synthetic detergent, or of a combination of different wetting and dispersing agents. As a rule, it is advantageous to convert the dyestufls to be used in a dye preparation before dyeing, which preparation contains a dispersant and the finely dispersed dyestuif in such a form that when the dyestufi preparation is diluted with water a fine dispersion results. Such dyestufi? preparations can be manufactured by a method known per se, for example by grinding the dry or wet dyestuff with or without addition of a dispersant during grinding. It is also possible to dye the afore-mentioned synthetic fibres in a solution of the dyestuif in an organic solvent.

In aiming at strong dyeings on polyethyleneterephthalate fibres it proved advantageous to add a swelling agent to the dyebath, or to carry out the dyeing process under super-atomspheric pressure at a temperature above (3., for example at C. Suitable swelling agents are aromatic carboxylic acids, for example benzoic or salicyclic acid, phenols, for example orthoor para-hydroxydiphenyl, salicyclic acid methyl ester, aromatic halogen compounds, for example chlorobenzene, ortho-dichlorobenzene or trichlorobenzene, phenylmethylcarbinol 1 l or diphenyl. For dyeing under super-atmospheric pressure it is advantageous to make the dyebath slightly acidic, for example by adding a weak acid, for example, acetic acid, to it.

The dyestuffs to be used according to this invention are especially suitable for dyeing by the so-called thermosetting process according to which the fabric to be dyed is impregnated with an aqueous dispersion of the dyestuff, which advantageously contains 1 to 50% of urea and a thickener, especially sodium alginate, preferably at a temperature not exceeding 60 C. and then to express it by a method known per se.

For fixing the dyestuif on it, the fabric thus impregnated, advantageously after first having been dried, for example in a current of warm air, is heated to a temperature above 100 C., for example a temperature within the range from 180 to 210 C.

The above-mentioned thermosetting process is especially suitable for dyeing union fabrics of polyester fibres and cellulose fibres, especially cotton. In this case the padding liquor contains, in addition to the unquaternated water-insoluble dyestuff to be used according to this invention, also dyestuffs suitable for dyeing cotton, or especially so-called reactive dyestuffs, that is to say dyestuffs that can be fixed on the cellulose fibre with formation of a chemical bond, thus, for example, dyestuffs that contain a chlorotriazine or chlorodiazine residue. In the latter case it has been found advantageous to add an acid acceptor, for example, a carbonate, phosphate, borate or perborate of an alkali metal, or a mixture thereof, to the dyebath. When vat dyestuffs are used, the padded fabric is first heat-treated and then treated with an aqueous alkaline solution of one of the reducing agents conventionally used in vat dyeing.

The dyeings on polyester fibres obtained by present process are advantageously subjected to an after-treatment, for example, by heating them with an aqueous solution of a nonionic detergent.

The dyestuffs used in the present invention may be applied by printing instead of by impregnation. For this purpose, for example, a printing ink is used that contains in addition to the auxiliaries generally used in printing for example, wetting and thickening agents, the finely dispersed dyestuif, if desired in admixture with one of the above-mentioned cotton dyestuffs, if desired in the presence of urea and/or of an acid acceptor.

Furthermore, it is also possible to dye or print in an organic liquor, for example in a mixture of perchloroethylene and sufficient dimethylacetamide to enable the dyestuff to dissolve in the dye liquor.

The new dyestuffs can also be used for spin-dyeing polyamides, polyesters or polyolefins. The polymer to be dyed is advantageously admixed with the dyestulf in the form of a powder, granules or chips, as a ready spinning solution or in the molten state, and the dyestutf is used in the dry state or in the form of a dispersion or solution in a solvent which, if desired, may be volatile.

The dyestuffs of the present invention can also be used for mass dyeing polymers of acrylonitrile, or polyolefins and other plastic masses, also for coloring oil paints and lacquers. If desired, the above-mentioned thermosetting process may be applied.

Some of the new dyestuffs are valuable pigments that can be used for a wide variety of pigment applications, for example in the finely dispersed form for dyeing rayon and viscose or cellulose ethers and esters, for the manufacture of inks, especially inks for ballpens, as well as for the manufacture of coloured lacquers or lake formers, solutions and products of acetylcellulose, nitrocellulose, natural or synthetic resins, for example, polymerization or condensation resins, for example aminoplasts, alkyd resins, phenoplasts, polyolefins, for example, polystyrene, polyvinylchloride, polyethylene, polypropylene, polyacrylonitrile, rubber, casein, silicone and silicone resins.

12 The following examples illustrate the invention. Unless otherwise indicated, the parts and percentages are by weight.

Example 1 16.5 parts of 1-amino-4-nitroanthraquinone-2-carboxylic acid chloride and 13.5 parts of a styryl dyestuff of the formula TIC-1H4 (B in chlorobenzene are stirred for 16 hours in an oil bath maintained at C. The cooled mixture is suction-filtered and the filter cake washed with chlorobenzene. The residue is suspended in warm methanol, again suctionfiltered and washed with methanol until the filtrate runs colourless. After drying, a product of the formula COO C234 H0 C2114 ll l CH: 0 N02 fl) NH:

C O 0 05ft /N CH=C (C N) 1 CH COOC2H4 l CH3 0 NO: (III) which dyes polyester fibres yellow shades.

The catalytic hydrogenation of the dyestutf of the Formula HI in dimethylformamide in the presence of Raney nickel gives, after the calculated quantity of hydrogen gas has been absorbed, an almost theoretical yield of the dyestuff of the formula which dyes polyester fibres vivid green shades having good fastness properties.

13 An analogous reaction produces the dyestuifs of the formula 3.3 parts of 1-amino-4-nitro-anthraquinone-2-carboxylic acid chloride and 3.74 parts of a styryl dyestufi of the formula O C-OCZHI is chlorobenzene are stirred for 16 hours on an oilbath maintained at 140 C. The cooled reaction mixture is suctioned ofl", washed with chlorobenzene and then with methanol, and dried. 6 parts of the resulting dyestuif of (which dyes polyester fibres yellow shades) are catalytically hydrogenated in 50 parts of dimethylformamide in in the presence of Raney nickel, until the calculated quantity of hydrogen has been absorbed. The resulting dyestuif of the formula I CONHO 02115 dyes polyester fibres green shades having good fastness properties.

In an analogous manner there are obtained the dyestuffs of the formula MANUFACTURING THE STYRYL DYESTUFFS 4 parts of the product of the formula NO: N l

(prepared by acylating the B-hydroxyethyl compound with meta-nitrobenzoylchloride) in acetonitrile are hydrogenated with a catalyst of 10% palladium on carbon until the quantity of hydrogen needed to reduce the nitro group has been absorbed. No more starting material can be identified in the thin-layer chromatogram. The acetonitrile is distilled ofi? and the residue worked up, to yield the dyestuif of the formula The paraand ortho-aminobenzoyl esters'are obtained in a similar manner. The styryl dyestuifs, in which the N- ethyl group is replaced by a substituted alkyl group, are obtained by using the suitably modified starting compounds.

Example 3 5.65 parts of the product of Formula II mentioned in Example 1 and 2.26 parts of chloroacetylchloride in nitrobenzene are stirred for 20 hours at to C. After cooling, the batch is suction-filtered, washed with methanol and dried, to yield a product of the formula 0 NHz C O 0 C314 /N- CH=C(CN) g CICHzCO OH4C2 (5 which dyes polyester fibres yellow shades.

The catalytic hydrogenation of 1.9 parts of this prodduct in 25 parts of dirnethylformarnide with Raney nickel until the theoretical quantity of hydrogen gas has been absorbed gives an almost quantitative yield of a dyestuff of the formula 15 which dyes polyester and nylon fibres vivid green shades having good fastness properties.

Example 4 3.5 parts of 1,5-dihydroxy-4,8-dinitroanthraquinone and 7.5 parts of a styryl dyestuff of the formula in nitrobenzene are stirred for 20 hours in a bath maintained at 180 C. with a catalytic quantity of copper-(I)- chloride. After cooling, the mixture is poured into methanol. The precipitated dyestutf is suctioned off and the filter cake boiled in methanol, suctioned 01f, washed with methanol and dried, to yield a dyestulf of the formula OzN (I) OH HsC:

'Example '5 When the product of the Formula II mentioned in Example 1 is subjected to catalytic reduction with Raney nickel in dimethylformamide, the dyestutf of the formula NH; ll 1 COOCZHK /CN H OlliCa I C N (IS CH3 is obtained; it dyes polyester fibres brilliant green shades having excellent fastness properties.

11 part of the resulting dyestuff is ground wet with 2 parts of an aqueous solution of 50% strength of the sodium salt of dinaphthylmethane-disulphonic acid and then dried.

(I'his dyestuff preparation is stirred with 40 parts of an aqueous solution of 10% strength of the sodium salt of rN-benzyl- -heptadecyl-benzimidazole-disulphonic acid and 4 parts of 40% acetic acid solution are added. This batch is diluted with water to form a dyebath of 4000 parts.

parts of a cleaned polyester fibre fabric are immersed in this dyebath at 50 C., the temperature is raised to to 'C. during half an hour and dyeing is carried out in a closed vessel for 1 hour at this temperature. The material is then thoroughly rinsed. The resulting brilliant green dyeing has excellent properties of fastness to light and sublimation.

Example 6 When 33 parts of 1-arnino-4-nitro-anthraquinone-2- carboxylic acid chloride are reacted with 1135 parts of the styryl dyestutf of the Formula I mentioned in Example 1, followed by catalytic reduction as described in Example 1, the dyestufi of the formula II I O NHz H 0 HzN is obtained which also dyes polyester fibres fast green shades.

'20 parts of this dyestuff are ground with parts of water containing 40 parts of sodium dinaphthylmethanedisulphonate.

A padding liquor is prepared from 200 parts of the above dyestufl? preparation, 100 parts of carboxymethylcellulose (4% aqueous solution) and 700 parts of water by stirring the dyestuif preparation described above into the previously diluted thickening by means of a high-speed stirrer, and the mixture is then adjusted to a pH-value of 6 by means of acetic acid of 80% strength. A fabric of polyester fibres is padded in this liquor at 30 C. and then expressed to a weight increase of 60%, and then dried at 70 to 80 C. The fabric is then heated on a tenter frame for 60 seconds at 210 C., then washed in hot water and thoroughly rinsed in cold water. A green dyeing of good fastness properties is obtained.

Example 7 A mixture of 7.2 parts of 1-amino-4bromoanthraquinone-2-carboxylic acid chloride and 7.5 parts of the styryl dyestuff of the formula in 50 parts by volume of chlorobenzene is stirred and refluxed for 16 hours, then cooled and the residue is filtered off and washed with benzene. After drying, there are obtained 12.2 parts of the dyestutf of the formula COIIIH O-oo-ocnn N A mixture of 3.5 parts of 1,5-dihydroxy-4,8-dinitroanthraquinone, 8 parts of the styryl dyestuff of the formula N02 OH which on reduction with Raney nickel in dimethylformamide until the calculated quantity of hydrogen gas has been absorbed yields a green dyestulf of the formula NH: O 0

H I ll 6H DIHOCONH-CzHa Instead of 1,5-dihydroxy-4-dinitroanthraquinone it is possible to use 1,8-dihydr0xy-4,S-dinitroanthraquinone or a mixture of these two anthraquinone derivatives, whereby in an analogous manner green dyestuffs are obtained.

The styryl dyestuff used above can be manufactured in the following manner: reduction of N'eyanoethyl-N-ethylm-toluidine indiquid ammonia under super-atmospheric pressure to form N-y-aminopropyl-N-ethyl-m-toluidine; reaction of the amino group with para-nitrobenzoylchloride; formylation according to Vilsmeyer to form the aldehyde; condensation of the aldehyde with malodinitrile and reduction of the nitro group with hydrogen in the presence of Raney nickel in dimethylformamide.

We claim:

1. An anthraquinoid dyestufr which corresponds to the formula in which Z is OH, NH or NHR where R is methyl or ethyl, Z is N0 Br, NH or NHR where R is methyl or ethyl, Y is SO or -CO-,

R is a lower alkylene group,

R is unsubstituted lower alkyl or lower alkyl substituted by cyano, chloro, C -C allroxy, hydroxy, C -C alkoxycarbonyl, C C- alkylcarbonyloxy, methylcarbamyloxy, phenylcarbamyloxy, C -C alkoxycar bonyloxy, cyanethoxy, phenyl or chloracetoxy,

c and d are each, independently, H, Cl, CH C H OCH OC H phenylthio or phenoxy, and

X is carb(C -C )alkoxy carbonamido, N-methylcarbonamido, N,N-dimethylcarbonamido phenylsulfonyl or cyano.

2. An anthraquinoid dyestuff as claimed in claim 1 in which Y is CO, V is -O, X is cyano and c is hydrogen.

3. An anthraquinoid dyestuff as claimed in claim 1 in which Y is -CO, V is 0, R is a lower alkyl group and X is cyano.

References Cited UNITED STATES PATENTS 3,534,068 10/1970 Mayer et a1 260-377 LORRAINE A. WEINBERGER, Primary Examiner E. I. SKELLY, Assistant Examiner U.S. Cl. X-R.

(5/69) TED STATES PATENT OFFICE Q'HHQATE 0F CORRECTION Patent No. 3,663,577 Dated May 16, 1972 Inventor(s) Richard Peter et a1 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 1, line t, delete CIIIBA Limited" and substitute CIBA-GEIGY AG Signed and sealed this 23rd day of April 197L (SEAL) Attest:

EDWARD I 1wFLblTCHER,JRo C. MARSHALL DANN Attesting Officer Commissioner of Patents aaa. 

